Impedance spectroscopy behavior of cross-linked polyethylene

Citation
Le. Caron et al., Impedance spectroscopy behavior of cross-linked polyethylene, J MACR S PH, B39(1), 2000, pp. 27-38
Citations number
30
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF MACROMOLECULAR SCIENCE-PHYSICS
ISSN journal
0022-2348 → ACNP
Volume
B39
Issue
1
Year of publication
2000
Pages
27 - 38
Database
ISI
SICI code
0022-2348(2000)B39:1<27:ISBOCP>2.0.ZU;2-4
Abstract
Impedance spectroscopy (IS) was to analyze the dielectric behavior of cross -linked polyethylene (XLPE) and to produce an electric analog equivalent ci rcuit. In the high-frequency range, a peak was observed, and the values of the resistance for this particular frequency were calculated for the XLPE s amples with different thicknesses. Two ohmic regions with different slopes were observed, suggesting the existence of two regions in the crystalline p hase with the same morphological characteristics, but different sizes (i.e. , similar time constants). A reduced two-phase model was used to explain th e observed behavior of samples with different thicknesses. It is suggested that thinner samples present a crystalline layer with lamellae perpendicula r to the surface, whereas in thicker samples, a bulk spherulitic morphology is dominant.